GUI Swing 3.6 列表

3.6 列表

• 下拉框

  public class TestCombobox extends JFrame {
      public TestCombobox() {
          Container contentPane = getContentPane();
  
          //下拉框
          JComboBox jComboBox = new JComboBox();
          jComboBox.addItem("C");
          jComboBox.addItem("JAVA");
          jComboBox.addItem("C++");
          jComboBox.addItem("PYTHON");
  
          contentPane.add(jComboBox);
  
          setVisible(true);
          setBounds(200,200,200,100);
          setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
      }
  
      public static void main(String[] args) {
          new TestCombobox();
      }
  }
  
  

• 列表框

  public class TestJlist extends JFrame{
      public TestJlist() {
          Container contentPane = getContentPane();
  
          //列表框、
          //首先要创造文本内容
          String[] arr = {"张三","李四","王五","赵六"};
          //创造列表框
          JList jList = new JList(arr);
          contentPane.add(jList);
  
          setVisible(true);
          setBounds(200,200,200,150);
          setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
      }
  
      public static void main(String[] args) {
          new TestJlist();
      }
  }
  

  • 应用场景

    选择地区，或者一些单个选项

    列表，展示一些信息，一般是动态扩容！